Word: x-l
(lookup in dictionary)
(lookup stats)
Dates: during 1973-1973
Sort By: most recent first
(reverse)
...larger, visible star, it would draw gases from the star. As those gases spiraled toward the black hole, they would collide, compress and heat up to as high as 100 million degrees-enough to produce an intense flow of X rays. Recent findings by NASA'S new Copernicus earth satellite strongly support this scenario. Cygnus X-l shows a sharp decrease in X-ray emissions every 5.6 days. That, according to optical astronomers, seems to be the time it takes the bright star's unseen companion to make one trip around it. In other words, every 5.6 days...